Classifications

• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
  • D07B7/02—Machine details; Auxiliary devices
  • D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H81/00—Methods, apparatus, or devices for covering or wrapping cores by winding webs, tapes, or filamentary material, not otherwise provided for
  • B65H81/06—Covering or wrapping elongated cores
  • B65H81/08—Covering or wrapping elongated cores by feeding material obliquely to the axis of the core
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2301/00—Controls
  • D07B2301/25—System input signals, e.g. set points
  • D07B2301/251—Twist
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2301/00—Controls
  • D07B2301/35—System output signals
  • D07B2301/3583—Rotational speed
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2301/00—Controls
  • D07B2301/35—System output signals
  • D07B2301/3591—Linear speed
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2301/00—Controls
  • D07B2301/55—Sensors
  • D07B2301/5531—Sensors using electric means or elements
  • D07B2301/5572—Sensors using electric means or elements optical

Definitions

• the present invention relates generally to a device for making a covering or a high precision strand.
• the covering is an operation which consists in winding, preferably in contiguous turns, a secondary wire around a main wire resistant to traction.
• Guitar strings for bass notes are usually wrapped.
• Stranding is an operation which involves winding or twisting several wires together.
• Some flexible electrical cables are made up of several stranded wires.
• the stranding is currently done on traditional equipment in which wires are twisted together, each wire thus forming turns.
• the wrapping is currently done on traditional equipment in which at least one secondary wire is wound on a main wire, or core, the secondary wire thus forming turns which must in principle be contiguous or spaced by a precise constant distance.
• wires are stranded or gimped to constitute electrical cables representing characteristics of lines, such as characteristics of capacity, inductance, etc., the pitch of the turns must be kept constant with high precision.
• An object of the present invention is to provide a device for making a covering or a high precision strand.
• Another object consists in proposing such a device in which a pitch of a wire thus wrapped or stranded (that is to say wound) is of high precision, even over a very long length of cable thus formed.
• Another object is to provide such a device in which the winding speed can be very high, for example greater than 6000 revolutions per minute, and can also vary during the wrapping or stranding operation (this is - ie winding) or even become transiently zero, for example during a normal or emergency stop of the device, without all this significantly affecting said precision of the covering or stranding.
• Another object consists in proposing such a device in which the improvement thus brought about involves a relatively simple and inexpensive arrangement.
• a device for carrying out a continuous winding of at least one secondary wire around a main wire or a winding of several secondary wires on themselves, in order to constitute a cable comprises: winding equipment provided with a rotating cage allowing, by the rotation of said cage, to carry out said winding; supply equipment for supplying said secondary wire with said winding equipment; and pulling equipment for pulling said coiled cable; the device further comprising an optical sensor for optically measuring the angle made by the part of said secondary wire situated just before its winding with the longitudinal axis of said cable and to output a signal representative of said angle; and an automatic control device which receives said signal from said optical sensor, which compares this signal with a predetermined set value and which consequently controls a variation in an operating speed of at least one item of equipment selected from said item of equipment winding, the feeding equipment and the drawing equipment in order to cause the return of the value of said angle substantially to said predetermined set value.
• said optical sensor measures said angle at the level of a single secondary wire.
• said optical sensor measures said angle simultaneously at the level of several secondary wires and in that the automatic control device performs an average of the measurements thus carried out.
• a secondary wire intended to be wound together to form a stranded cable
• said optical sensor measures said angle at the level of only one of said secondary wires
• a angular position coding device being provided on said rotating cage in order to synchronize the capture of the measurement of said angle with the angular position of said rotating cage so as to produce a said angle measurement signal only when a secondary wire particular is in the measurement field of said optical sensor.
• said signal produced by said optical sensor is an analog signal which is proportional in voltage, to the angle or angles observed, allowing during a fluctuation of the angle or angles observed, to accelerate or decelerate the rotating cage through a variable speed drive, in order to keep the angle or angles initially created.
• the device makes it possible to guide a core continuously while ensuring that the pitch between the turns or the stress between the turns remains constant.
• the device makes it possible to coat several wires around a core while ensuring that the pitch between the turns is precise. According to another particular embodiment of the invention, the device makes it possible to permanently display an angle or angles of wires of different materials.
• said optical sensor comprises a housing including a light source which provides a light beam located in a plane intersecting said wire and including a light receiver in the form of a bar which produces a signal representative of the position along the bar of the impact of a part of the light beam specularly reflected by said wire, from which it follows that said optical sensor produces a signal which is representative of said angle while said wire crosses said incident light beam .
• FIG. 1 is a schematic general view of a device according to the invention
• Figure 2 is an enlarged partial schematic view of part of the device of Figure.
• Preferred embodiment of the invention In Figure 1, there is a device for making a covering or stranding according to the present invention.
• This device comprises in several following sub-assemblies: a single twist or covering stranding equipment 1 driven by a motor 2, associated with a variable speed drive 3; a tension regulated unwinder 4; an optical sensor 5; a metric counter 6 for programming several meters; a capstan 7 horizontal with crawler or vertical with pulleys in order to ensure the drawing of the product cable 8; a cutter 9 intended to cut the cable 8 product; a recovery tank 10 for recovering the cable sections; and a general control device 11.
• the operating principle of the device according to the invention is as follows. Compared to an electrical lockout which can be provided by the control device 11, a cage 12 of the simple twist equipment 1 rotates at a constant speed at the predefined (for example 8000 revolutions per minute). Similarly, with respect to another electrical setpoint, the horizontal capstan with crawler or vertical with pulleys 7 pulls the cable 8 at a predefined speed (for example 1 meter per minute). We therefore create a winding of a wire 13 or more wires around a single-strand or multi-strand core 14. The pitch P between turns thus obtained is therefore linked to the pulling speed V of the cable and to the speed of rotation R of the winding cage by the following formula:
• the device detects a variation in the analog voltage representative of this angle or these angles ⁇ and it modifies the instruction given to the winding cage 12 of the single twist equipment 1 in order to accelerate or decelerate the rotation speed of way to recover the drift or the drift ives of angles observed.
• the device permanently monitors the wire or wires forming a covering or a strand in order to ensure a perfect pitch between turns.
• the variation in the diameter of the guiding or stranding wire we are certain to obtain a pitch between turns or a level of stress between contiguous turns perfectly determined.
• FIG. 1 The simple twist stranding equipment 1 (FIG. 1) allows the rotation of its cage to wind a wire 13 (FIG. 2) around a core 14.
• the wire diameter can vary from 0.10 millimeter to several millimeters in single wire or in multi-strand.
• This wire can be of different materials, for example pure copper, silver copper, ferro-nickel, aluminum, bronze, synthetic material or any other material.
• the core around which the wire is wound can have a diameter of a few hundredths to several millimeters.
• the composition of this core can be a single-strand or multi-strand synthetic material or any other material.
• This unwinder 4 is regulated via a puppet (or several pulleys).
• This shoe ensures on the one hand a constant tension (from a few grams to several kilograms) of the wire which is pulled, but it also ensures a perfectly controlled wire flow rate thus avoiding possible jolts during the flow of this wire.
• This metric counter allows via previously recorded metering instructions to output information in voltage level in order to inform the capstan 7, which can be of any known type, for example of the horizontal track type (shown) or vertical with pulleys. It also informs, when the previously recorded footage is reached, the cutter 9 at the capstan outlet 7.
• the device can also include other conventional functional elements such as a marker 30, a capstan motor 32, a capstan variator 31 and a certain number of electrical connections transporting either electrical signals or electrical energy, these connections mainly connecting the control unit 11 and the variators 3 and 31, the optical sensor 5 and the counter 6.
• the control unit 11 may include a button 33 for variable control of the winding speed R (the rotation speed of cage 12) and a button 34 for variable control of the angle ⁇ .
• the invention relates more specifically to the sensor 5.
• This sensor 5 consists of a housing 17 including a light emission device 18 and a light reception device 19.
• the light emitting device 18 can be a lamp device, a light emitting diode, a laser or the like.
• the light-emitting device 18 comprises an optic which makes it possible to project a light beam 19 whose cross section 20 taken at the level of the supposed meeting between the beam 19 and the wire 13 has substantially the shape of a rectangle with one side lengthwise 21 substantially perpendicular to the wire 13.
• the side lengthwise 21 is relatively long, for example several millimeters and one side lengthwise 22 is comparatively short, for example a few hundredths of a millimeter.
• the beam 19 therefore propagates in a plane and that this plane intersects the wire 13 substantially perpendicularly. More precisely, the beam strikes the wire 13 in the part 13A of the wire 13 located between a pulley guide 23 of the wire and the core 14 or the other wires on which the wire 13 is wound.
• the part 19A of the beam 19 which actually strikes the wire 13 is specularly reflected (at least partly at a certain substantially planar solid angle, since the wire 13 is substantially cylindrical. Consequently, part 19B of the light thus specularly reflected reaches a precise and restricted place 24 on the surface of a light receiver 25 in the form of a bar which is capable of providing a digital or analog signal which is representative of the position of this place of impact 24.
• the angle ⁇ that the part 13A of the wire 13 makes with respect to the longitudinal axis of the core 14 is thus detected and measured precisely by the sensor 5.
• the part 13A of the wire rotates at high speed, for example 8000 revolutions per minute This does not cause any inconvenience for measuring the angle ⁇ because the portion of wire 13A returns a light only during the short instant when it crosses the incident light beam. 19.
• each wire being independent and passing over a separate pulley 23 and being similarly struck by the incident beam 19, it is possible to provide a coding wheel (not shown) on the rotating cage 13 which supports the pulleys 23, so that it is possible to select the signals transmitted by the receiver 25 so as not to keep only signals corresponding to a particular wire or several wires whose angles ⁇ are to be measured respectively.
• the angle ⁇ measurement can be used for:
• the angle ⁇ can generally correspond substantially to the angle ⁇ , but in the case of a wrapping, the angle ⁇ will be slightly greater than the angle ⁇ in order to produce a longitudinal stress between the adjacent contiguous turns of the cable as well product 8.
• a real implementation of such a device according to the invention has made it possible to note that the device can operate at speeds much higher than those currently accepted, while producing coiled cables (that is to say wrapped or twisted ) more precisely and while ensuring such production more reliably, that is to say with fewer manufacturing incidents such as breakage of wire, abnormal overlaps of wire, damage to a coating wire (for example an insulating varnish) and other incidents commonly occurring in conventional devices.
• the angle ⁇ can be chosen slightly greater than 90 ° in order to ensure good tightening of the contiguous turns of the wound wire.
• the invention is not limited to the embodiment which has just been described but it encompasses the variants or adaptations that can be envisaged on the basis of the concept corresponding to the present invention.

Landscapes

• Wire Processing (AREA)
• Ropes Or Cables (AREA)
• Tension Adjustment In Filamentary Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9417629

Family Applications (1)

Country Status (4)

Families Citing this family (7)

Family Cites Families (3)

• 1991
  • 1991-09-30 FR FR9112279A patent/FR2681881B1/fr not_active Expired - Fee Related
• 1992
  • 1992-09-30 EP EP19920921581 patent/EP0562087A1/fr not_active Withdrawn
  • 1992-09-30 JP JP5506654A patent/JPH06505538A/ja active Pending
  • 1992-09-30 WO PCT/FR1992/000906 patent/WO1993007330A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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